diff --git a/main.cpp b/main.cpp
index 2aa30fd..ec98bc9 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,8 +5,8 @@
 #include <thread>
 
 std::vector<int> read_measurements(const std::string& filename);
-void parallel_measurements(std::vector<int> measurements);
-void serial_measurements(std::vector<int> measurements);
+void parallel_measurements(std::vector<int>& measurements);
+void serial_measurements(std::vector<int>&  measurements);
 
 int main() {
     std::vector<int> measurements = read_measurements(R"(C:\Users\tilob\CLionProjects\threads\measurements.txt)");
@@ -26,7 +26,7 @@ int main() {
     std::cout << "Serial Took: " << diff.count() << "s\n";
 }
 
-void parallel_measurements(std::vector<int> measurements) {
+void parallel_measurements(std::vector<int>& measurements) {
     int numThreads = 4;
     std::vector<int> results(numThreads, 0);
     std::vector<std::thread> threads;
@@ -88,8 +88,8 @@ std::vector<int> read_measurements(const std::string& filename) {
     return result;
 }
 
-void serial_measurements(std::vector<int> measurements) {
-    int result = 0;
+void serial_measurements(std::vector<int>& measurements) {
+    int result = 1;
     for (size_t i = 1; i < measurements.size(); ++i) {
         if (measurements[i] > measurements[i - 1])
             ++result;